In Tokyo, the world's busiest station, three and 1/2 1,000,000 passengers every day arrive and depart every day through its 200 exits.

The majority of those travels in cities all over the world, commute to step from trains and link up with metro subway systems on the world's busiest count, their passengers without trains.

When trains began running in the latter half of the 19th century, London had a population of less than two million on New York.

Half of that, as those populations grew, train that works groups Railway did develop a new, important role as a form of transport for the journey to work.

From 18 63 trains were allowing people to commute from west of London ing to the city.

Trains would also shaped the fortunes of New York, but without the railways, Manhattan would not have developed as a financial center.

Urban development was a first concentrated in places where people could easily go to the station, so housing close to Victorian railway stations is always densely packed.

But then commuter network started to spread.

London is a good example where ah whole extensive network off suburban lines grew up from around the 18 fifties 18 sixties, first underground railway lines ran in a circle linking the city's commercial, retail and residential district's city's famed underground.

Map still shows these loops success that lines began to spread.

This spread created something entirely new.

Commute soothe.

First, enterprising developers called it Metro Land Habit of Commuting is established, bringing increasing numbers of people to main terminals created a new problem.

How to transport floods of commuters around the city.

Once the city has grown, people need not only to move from one urban area to another, which they might do only on an occasional basis for business or for what we now call leisure.

But you need to move around the city as well.

Railway operators wanted to link their main terminal stations, demolish city building, so a novel solution opened for business of January 10th 18 63.

The world's first underground railway.

Wooden carriages pulled six kilometers by steam locomotives threw gasoline stations.

Metropolitan Mind, the first underground railway connected the G W, are planning to station with Liverpool Street station and from that grew calmly please network off underground railways.

At the time, the idea was considered both outrages and a railway line constructed by digging great trenches, then covering a system of construction that is still used today with better systems.

They build, cut and cover railways, and then they built kind of to railways where you bore through the ground.

So they developed new types of railway.

It was an immediate success.

Other cities followed.

And now there are Metro's underground subway systems, allover the world.

Places like Paris or Berlin or Moscow, where the public transport systems built up in an era when there was no alternative on those public transport system, have by and large survived and still cater for your vast observe people.

In 1904 when New York subway first opened, he claimed to be the most extensive underground railway network, comprising of 400 kilometers of track and almost 500 stations.

But over 100 years later, Shanghai can confidently challenge that title.

Today, Seoul, South Korea, boasts the longest subway system at 940 kilometers on Tokyo Metro is the busiest.

Moscow metro is only the fourth busiest in the world, but it is easily the most beautiful, with grandly decorated stations lit by chandeliers.

Construction began in 1935 understand, and was one of the most extravagant architectural projects undertaken by Soviet plan.

As monuments to the workers and ways of edifying masses, Metro was designed with the intention of showcasing the country's power.

There are now well over 100 metro systems in the world, providing part of the answer to city congestion.

And on every continent, new ones are under construction, with deep tunnel extension of the Chu developments.

No Nas underground suburbs appeared with bus service is feeding stations.

But the real transformation of the true into a commuter focus transit system was bringing the trains out of the ground.

Originally designed to move people around, the London Underground soon began to reach out to passengers beyond the perimeter.

To compete with mainline service is to become the transit system that Metro networks are now in.

1932.

That you reached stand almost 18 kilometers from the west end of London on not a great distance by modern standards.

To commute that distance prior to the inception of the railway was a hardship.

The underground, which could carry a commuter to any part of the metropolis, was now a real alternative.

Come to the mainline service, accelerate to change, permanently altered the look of modern cities and created the suburban way of life.